TWI580535B - Into the tool - Google Patents

Description

Driving tool

The present invention relates to a driving tool such as a compressed air driven type.

For example, the driving tool for driving a nail or the like into one piece of the workpiece (wood, etc.) is subjected to various measures for preventing an accidental opening operation (misoperation). Patent Document 1 listed below discloses, for example, a case where a driving operation is performed only in a case where the operation is performed in a predetermined order, and the operation is performed in an error sequence different from the normal order, A technique for implementing a sequence mechanism in which a driving action is performed to prevent a malfunction.

According to the prior sequence mechanism, the front end of the contact arm is disposed around the exit opening of the driving tool, and the other end side is located near the switch lever of the triggering mode in which the user uses the fingertip to perform the pulling operation, during the driving operation. First, the front end of the contact arm is pressed against the driving material, and the opening operation of raising the other end side is performed, and then the pulling operation of the switching lever is performed in the normal operation sequence of the pulling operation of the switching lever. In order to be effective, the entry action is implemented. In contrast, before the opening operation of the contact arm, the erroneous operation sequence of pulling the operation switch lever is configured such that even if the contact arm is opened later, the pulling operation of the first switching lever becomes invalid. As a result, the entry action was not implemented.

Unlike the above-described sequence mechanism, it is known for the driving tool to prevent the punching action (slap) when the punching member in the cassette is emptied, and to prevent the scratching mechanism from being scratched. Patent Document 2 listed below discloses that The technology of the anti-aircraft mechanism.

[Previous Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2008-213109

[Patent Document 2] Japanese Patent Laid-Open Publication No. 2004-255558

However, the conventional air defense mechanism is configured such that when the driving member is exhausted in the cassette or when the number of the driving members is less than or equal to a fixed number, for example, the above-mentioned Patent Document 2 prohibits (trigger lock) the switching lever. Pull the operation, or prohibit the opening operation of the contact arm. Therefore, in the case where the anti-aircrafting mechanism is actuated, it is easy to attach a relatively large pulling operation force to the switch lever, or to easily apply a pressing force to the contact arm more generally. Therefore, it is necessary to increase the rigidity of the front switch lever or the contact arm and to support the rigidity of the peripheral portion thereof, so that the thickness of each part and each member is thickened, and therefore, it is difficult to be compact, and finally, the above sequence is provided. Institutional access tools failed to provide those who included anti-aircraft agencies.

The present invention has been developed in view of the related problems of the prior art, and an object thereof is to provide a driving tool that not only has a sequence mechanism but also has an anti-aircrafting mechanism.

The above problems are solved by the following invention.

The first invention is a driving tool which is provided in a regular sequence only for performing a pulling operation of the switching lever after the contact arm is opened. In the case of the operation, in addition to the sequence mechanism of the driving operation, and the case where the remaining amount of the driving member in the cassette reaches a certain number or less, the anti-air-sending mechanism that disables the pulling operation of the switch lever is used.

According to the first aspect of the invention, not only the sequence mechanism but also the air defense mechanism is provided. The air defense mechanism is configured not to prohibit (trigger lock) the pulling operation of the switch lever, but to invalidate the pulling operation. Therefore, the relatively large (forced) pulling operation force is not attached to the switch lever, so that the rigidity of the peripheral portion and the peripheral portion thereof are not required to be raised as before, thereby realizing the switch lever and its peripheral portion. The thinning and the like are compact, so that not only the sequence mechanism can be assembled compactly, but also the anti-aircrafting mechanism can be assembled compactly.

According to a second aspect of the invention, there is provided a driving tool according to the first aspect of the invention, characterized in that the driving tool is provided with an idler gear which is rotatably disposed between the effective position and the ineffective position on the switch lever to switch the effective operation of the pulling operation. Between the idler and the contact arm, there is provided an idler restricting member movably disposed at a restricted position for fixing the idler to the effective position and an unrestricted position for allowing the idler to be displaced toward the inactive position. The sequence mechanism is configured to use a normal operation sequence to displace the idler restricting member to the restricted position, and to fix the idler to the effective position, thereby making the pulling operation of the switch lever effective, and on the other hand, contacting When the arm is in the closed position, the idler restricting member is placed in the unrestricted position to allow the idler to be displaced toward the inactive position, thereby invalidating the pulling operation of the switch lever; and the anti-airback mechanism is provided with a residual detecting member. Moving to the remaining amount detecting position when the remaining amount of the punching member in the cassette reaches a certain number or less; and the air defense detecting mechanism is configured to detect by the remaining amount The member supports the idler restricting member, and the idler restricting member is retracted from between the idler and the contact arm by integrally moving to the remaining amount detecting position, and the switch is made to allow the idler to be displaced toward the ineffective position. The pull operation of the joystick is invalid.

According to the second aspect of the invention, if the remaining amount of the driving member in the cassette reaches a certain number or less, the idler restricting member is retracted to the third position which is not the restricted position or the non-restricted position, and the idler is allowed to face the invalid position. The displacement is thereby invalidated by the pulling operation of the switch lever. Therefore, regardless of the normal operation sequence or the wrong operation sequence, when the remaining amount of the punching member in the cassette reaches a certain number or less, although the pull operation of the switch lever can be implemented, the air strike can be performed by air defense. The mechanism invalidates the pulling operation, so that the driving action is not performed.

In this way, according to the above-described air defense striking mechanism, even if the pulling operation of the switch lever is performed, the pulling operation is invalidated, and the driving operation is not performed, so that the pulling operation force that is triggered by the previous configuration is not attached. The switch lever is used, whereby the compactness of the switch lever and its periphery can be achieved compared to the prior art.

The third invention is a driving tool which is the driving tool of the second invention, wherein the idler restricting member is rotatably supported by the remaining amount detecting member.

According to the third aspect of the invention, if the remaining amount of the driving member in the cassette reaches a certain number or less, the remaining amount detecting mechanism moves to the detecting position, and the idler restricting member and the remaining amount detecting mechanism are integrally retracted to The third position. The idler restricting member is rotatably supported between the restricted position and the unrestricted position with respect to the remaining amount detecting member. The margin of the punch in the box is greater than a certain number In the case of the situation, the remaining amount detecting member is located at the non-detecting position, and at this time, the idler restricting member is rotated between the restricted position and the unrestricted position.

The fourth invention is a driving tool according to the third aspect of the invention, wherein the idler restricting member is energized toward the unrestricted position side.

According to the fourth aspect of the invention, the idler restricting member is energized by the side (safe side) in which the pulling operation of the switch lever is disabled due to the displacement of the idle lever toward the ineffective position, and the accident is prevented. Into the action.

According to a fifth aspect of the invention, there is provided a driving tool according to any one of the first to fourth aspects of the present invention, wherein the cartridge is provided with a depth for inserting the punching member into the punching member. The depth adjustment device is driven, and the penetration depth adjustment device includes a material abutting arm that abuts against the driving material, and is configured to adjust the driving depth by changing the position of the material abutting arm with respect to the ejection opening.

According to the fifth aspect of the invention, the distance between the driving material and the ejection opening can be changed by the position change of the material abutting arm, and the distance between the driving material and the ejection opening can be changed when the tool body is pressed (the opening operation of the contact arm). Thereby, the length adjustment mechanism required for changing the length of the contact arm and changing the configuration of the penetration depth can be omitted, whereby the configuration of the periphery of the contact arm and the compactness of the switch lever and its peripheral portion can be realized, thereby not only The sequence mechanism can be assembled compactly, and the air defense mechanism can be assembled compactly.

Next, an embodiment of the present invention will be described based on Figs. 1 to 13 . Fig. 1 and Fig. 2 show the appearance of the driving tool 1 of the present embodiment, and Fig. 3 shows the internal structure thereof. The driving tool 1 of the present embodiment includes a body portion 2 having a striking mechanism mainly including a cylinder 11 and a piston 12, and a handle for the user to hold. The part 3 and the cassette 4 which can be loaded with a plurality of punching members n~n. The handle portion 3 is provided in a state of extending from the side portion of the body portion 2 toward the side. In the vicinity of the base of the handle portion 3, a switch lever 5 for the user to perform a pulling operation and a trigger valve 20 opened above the switch lever 5 by an effective pulling operation are disposed.

A plug joint 3a for connecting an air hose for supplying compressed air is provided on the front end surface of the handle portion 3. The compressed air is supplied into the pressure accumulation chamber 3b formed inside the handle portion 3 by an air hose connected to the plug joint 3a. The driving tool 1 operates the compressed air stored in the pressure accumulation chamber 3b as a drive source. As shown in FIG. 3 and below, in the handle portion 3, in addition to the pressure accumulation chamber 3b, an exhaust chamber 3c is provided. The exhaust of the main body portion 2 and the trigger valve 20 is exhausted from the exhaust port provided at the front end of the handle portion 3 via the exhaust chamber 3c.

The driving front end portion 10 is provided in a state of extending downward from the lower portion of the main body portion 2. A driving path 10b is formed inside the driving front end portion 10. An injection port 10a is provided at the front end (lower surface) of the front end portion 10 which is inserted into the front end of the driving path 10b. The punching member n is punched one at a time from the ejection opening 10a. The front end portion 6a of the contact arm 6 is adjacent to the ejection opening 10a and protrudes from the front end of the front end portion 10. The contact arm 6 will be described later.

The cassette 4 is equipped in a state of being spanned between the front end portion 10 and the front end of the handle portion 3. In the cassette 4, a plurality of driving members n to n are temporarily joined in parallel, and are loaded in a state in which a flat-shaped connecting driving member is provided. The plurality of driving members n to n loaded in the cassette 4 are loaded by the push rod 4b energized by the feed spring 4a, and are loaded to the side of the driving path 10b, and the body is loaded. The driving operation of the unit 2 performs the pitch feeding in conjunction with each other. 1 and 3, the driving members n to n are fed at a pitch in the left direction (the feeding direction of the driving member) indicated by the hollow arrow in the drawing. The plurality of punching members n to n are loaded from the loading port 4c of the rear end portion of the punching member in the feed direction.

At the rear end portion of the cassette 4 in the feeding direction, a rod 7 for opening and closing the cassette cover portion is provided when the cassette 4 is loaded with the driving tool 1.

On the lower surface of the cassette 4, a driving depth adjustment device 8 is provided. The penetration depth adjusting device 8 includes a material abutting arm 8a that abuts against the elongated material W and an adjustment dial 8b that changes the position of the material abutting arm 8a. The base end side (the right end side in Fig. 1) of the material abutting arm 8a is fixed to the lower surface of the cassette 4. The front end portion 8e (the left end side in Fig. 1) of the material abutting arm 8a is vertically displaceable. The material abutting arm 8a is energized by a returning force of its own elastic deformation in a direction in which the front end portion 8e side is displaced upward (the direction tilted in the clockwise direction in FIG. 1). . An adjustment dial 8b is supported between the front end portion 8e of the material abutting arm 8a and the lower surface of the card slot cassette 4. The adjustment dial 8b has a circular plate shape and is rotatably supported to be rotatably supported by the lower surface of the card slot cassette 4. On the lower surface of the adjustment dial 8b, a plurality of engaging recesses 8c to 8c are formed in the circumferential direction. The upper surface of the front end portion 8e of the material abutting arm 8a is provided with an engaging convex portion 8d fitted into each of the engaging recess portions 8c. The engagement recesses 8c to 8c of the adjustment dial 8b gradually change in depth in the circumferential direction. By rotating the adjustment dial 8b, the engaging convex portion 8d can be fitted into the engaging recess portion 8c of different depths, and the position of the front end portion 8e of the material abutting arm 8a with respect to the card slot cassette 4 can be changed up and down, and further As shown in FIGS. 1 and 2, when the engaging convex portion 8d is engaged with the adjustment dial 8b, In the deepest engagement recess 8c, the front end portion 8e is in the closest state to the lower surface of the cassette 4, and in this state, the penetration depth is maximized. On the other hand, when the engaging convex portion 8d is engaged with the shallowest engaging concave portion 8c of the adjusting turntable 8b, the front end portion 8e is in a state farthest from the lower surface of the cassette 4, and in this state, the depth of penetration is entered. Become the shallowest state.

The lower surface of the material abutting arm 8a that is positionally adjusted by the rotational operation of the adjustment dial 8b is brought into contact with the driving material W, whereby the driving depth set by the driving member n can be driven. Enter the material W.

The driving tool 1 of the present embodiment has an unprecedented feature that the driving tool 1 includes a sequence mechanism S that is implemented in the body portion 2 only when the operation is performed in a normal order. The driving action; and the air defense mechanism K are used to prevent the body portion 2 from being smashed when the remaining amount of the driving members n to n in the cassette 4 reaches a certain number or less. Hereinafter, the internal structure of the main body 2 and the trigger valve 20 and the operation thereof will be described before the description of the two mechanisms S and K.

As shown in FIG. 3 and below, a cylindrical cylinder 11 is built in the main body 2. The piston 12 is built in the airtightness of the cylinder 11 and is movable up and down. The long striking hammer 13 for striking the striking member is disposed in a state of extending long from the center of the lower surface of the piston 12 toward the lower side. The lower end portion of the hammer 13 is inserted into the driving path 10b of the driving front end portion 10. When the hammer 13 is lowered by the lowering of the piston 12 in the cylinder 11, the head of one of the driving members n supplied into the driving path 10b is struck and the self-ejection port 10a is ejected. One of the punched pieces n is directly driven into the punching material W.

The lowering of the piston 12 is performed by supplying compressed air to the upper chamber of the piston of the cylinder 11. Implemented within 12a. The rising of the piston 12 is performed by winding the compressed air supplied into the upper chamber 12a of the piston into the lower piston chamber 12b via the return air chamber 11b provided around the cylinder 11, and opening the upper chamber 12a of the piston. Implementation. The switching of the supply of the compressed air to the upper chamber 12a of the piston and the opening of the atmosphere (supply and exhaust) is performed by the opening and closing operation of the above-described trigger valve 20. When the trigger valve 20 is opened, the compressed air is supplied from the pressure accumulation chamber 3b to the upper piston chamber 12a via the supply and exhaust passage 14, so that the piston 12 is lowered to perform the driving operation. When the trigger valve 20 is closed, the upper piston chamber 12a is opened to the atmosphere via the supply and exhaust passage 14 and the exhaust chamber 3c, and the piston 12 is returned to the top dead center.

The opening and closing operation of the trigger valve 20 is performed by the pulling operation of the switch lever 5 or the release of the pulling operation. The trigger valve 20 is opened by the effective pulling operation of the switch lever 5, and is closed by the release of the pulling operation.

3 shows the initial state of the main body portion 2 and the trigger valve 20 and the non-operating state of the driving tool 1. Therefore, in Fig. 3, the piston 12 is at the top dead center. Fig. 5 is a view showing a state at which the time of the driving operation is performed. Therefore, the piston 12 in Fig. 5 is located at the bottom dead center. Hereinafter, the operation of the main body unit 2 and the trigger valve 20 will be briefly described based on FIGS. 3 and 5.

First, in the initial state shown in FIG. 3 and the state in which the switch lever 5 is not pulled (the closed state of the trigger valve 20), the valve stem 21 of the trigger valve 20 is located to be closed downward by the shank 22 position. In the closed position, the actuating valve 23 is in a state in which the valve body 24 is positioned on the upper side by the air pressure of the pressure accumulating chamber 3b acting on the lower surface thereof and the ability of the shank spring 22. In this state, the air pressure in the pressure accumulation chamber 3b acts on the inner peripheral side of the valve casing 24 to the main The state of the lower surface of the valve 25. Therefore, the main valve 25 is in a state in which the valve body 24 is located at the upper open air position by the air pressure acting on the lower surface thereof and the ability of the valve spring 26. The state in which the main valve 25 is located at the open air position is such that the upper piston chamber 12a is blocked by the pressure accumulation chamber 3b, and the air supply and exhaust passage 14 communicates with the exhaust chamber 3c in an open state.

Next, as shown in Fig. 5, if the valve stem 21 is pressed against the shank 22 by the effective pulling operation of the switch lever 5, the trigger valve 20 is opened. When the valve stem 21 is pressed toward the upper side, the lower side of the actuating valve 23 is open to the atmosphere, and the actuating valve 23 resists the urging force of the shank 22 by the air pressure acting on the accumulator chamber 3b of the lower outer peripheral surface thereof, The valve housing 24 is displaced to the lower side. When the actuation valve 23 is displaced to the lower side with respect to the valve housing 24, the lower surface of the main valve 25 is blocked by the pressure accumulation chamber 3b, and passes through the exhaust hole 25a provided on the inner circumference side and the upper portion of the valve housing body 24. It is connected to the state of the exhaust chamber 3c. Further, the pressure of the pressure accumulation chamber 3b constantly acts on the outer peripheral surface of the lower portion of the main valve 25. Therefore, if the atmosphere on the lower surface side of the main valve 25 is opened, the main valve 25 is displaced against the air supply position of the lower side by the biasing force of the valve spring 26 by the air pressure acting on the outer peripheral surface of the pressure accumulation chamber 3b. Thereby, the trigger valve 20 is opened. When the trigger valve 20 is opened, compressed air is supplied from the accumulator chamber 3b to the upper chamber 12a via the supply and exhaust passage 14. When the piston 12 is lowered by the compressed air supplied into the upper chamber 12a of the piston, the hammer 13 is integrally lowered as described above, and the driving is performed.

When the piston 12 reaches the bottom dead center, the compressed air in the upper chamber 12a of the piston flows into the return air chamber 11b via the air holes 11a to 11a provided in the cylinder 11. The compressed air flowing into the return air chamber 11b is wound through the air hole 11c provided at the lower portion of the cylinder 11. Into the lower piston chamber 12b, it acts on the lower surface of the piston 12. This return air becomes a drive source for raising the piston 12.

After the end of the driving, if the pulling operation of the switch lever 5 is released, the valve handle 21 is returned to the lower closed position by the urging ability of the shank 22, so that the trigger valve 20 is closed. When the valve stem 21 is returned to the closed position, the air pressure of the accumulator chamber 3b acts on the lower surface of the actuating valve 23, so that the actuating valve 23 rises relative to the valve casing 24. When the actuating valve 23 is raised, the main valve 25 is raised relative to the valve casing 24 by the air pressure of the accumulator chamber 3b acting on the lower surface of the main valve 25. When the main valve 25 is raised, the piston upper chamber 12a and the supply and exhaust passage 14 are blocked by the pressure accumulation chamber 3b and communicate with the discharge chamber 3c. When the upper chamber 12a of the piston is opened to the atmosphere, the piston 12 returns to the top dead center by the return air that is wound into the lower chamber 12b of the piston.

As described above, the trigger valve 20 is opened by the effective pulling operation of the switch lever 5, whereby the driving operation is performed in the body portion 2. After the driving, if the pulling operation of the switch lever 5 is released, the trigger valve 20 is closed to return the main body portion 2 to the initial state. The driving operation of the main body portion 2 is performed only when the switching lever 5 and the contact arm 6 are operated in the normal operation sequence by the sequence mechanism S described below.

The switch lever 5 is supported by the mechanism base portion 16 provided below the trigger valve 20 and on the side of the body portion 2 via the support shaft 5a so as to be tiltable up and down. The idler 9 is supported on the back (upper surface) of the switch lever 5. The idler 9 is supported by the support shaft 9a so as to be tiltable up and down, and has a relative displacement between the effective position and the inactive position with respect to the switch lever 5, and the pull operation of switching the switch lever 5 is effective. Invalid work can. The idler pulley 9 is energized by a torsion spring (not shown) in a direction in which the rotational distal end portion is pressed against the valve stem 21 (the effective position side in the clockwise direction in Fig. 3). The rotating tip end portion of the idler pulley 9 is in a state of constantly abutting against the valve stem 21 by the ability to be applied toward the effective position side. Further, the switch lever 5 is energized toward the closed position side on the lower side in the respective drawings by the reaction force of the biasing force of the idler gear 9 toward the effective position side.

If the pulling operation of the switch lever 5 is performed while the idler 9 is held in the effective position, the valve stem 21 of the trigger valve 20 is pressed upward by the upward displacement of the idler 9 accompanying the pulling operation. . When the pulling operation of the switch lever 5 is released, the switch lever 5 and the idler 9 are returned to the initial position (closed position) of the lower side by the ability of the shank 22 attached to the shank 21.

A trigger lock mechanism mainly composed of a cylindrical pin 15 is provided in the vicinity of the rotating base of the switch lever 5. The lock pin 15 is provided with an operation recess 15a formed by slitting in the radial direction thereof. When the lock lever 18 shown in FIG. 1 is tilted and the lock pin 15 is rotated by a fixed angle to bring the operation recess 15a downward, the end portion of the switch lever 5 enters the operation recess 15a. Thereby the unlocked state of the pulling operation is allowed. When the lock lever 18 is tilted to the lock position, and the operation recess 15a of the lock pin 15 is switched to the upward state, the end portion of the switch lever 5 interferes with the lock pin 15, so that the pull operation itself is prohibited. Trigger lock status. In the figure, both are shown in an unlocked state, and the following description also assumes that the trigger locking mechanism is in an unlocked state.

The contact arm 6 has a function for preventing an accidental driving action, so It is disposed across the range from the vicinity of the rotating base of the switch lever 5 to the vicinity of the ejection opening 10a. As described above, the front end portion 6a of the contact arm 6 protrudes from the front end of the front end portion 10 when it is driven. The upper end portion (actuating portion 6b) of the contact arm 6 is brought to the vicinity of the rotating base portion of the switch lever 5 in a state where the opposing mechanism base portion 16 is supported up and down. The contact arm 6 is supported as a whole in which it can be displaced up and down. As shown in FIG. 3 and below, the contact arm 6 is energized in a direction in which the front end portion 6a protrudes from the front end of the front end portion 10 by being fitted to the compression spring 17 that is inserted between the front end portion 10.

At the time of the driving operation, the driving tool 1 is pressed in a state in which the front end portion 10 is brought into contact with the driving material W, whereby the front end portion 6a of the contact arm 6 is relatively driven. The front end portion 10 is not raised and protruded, whereby the entire contact arm 6 is raised relative to the driving front end portion 10. When the contact arm 6 rises, the upper end of the actuating portion 6b is displaced upward.

An idler restricting member 30 is disposed between the actuating portion 6b of the contact arm 6 and the idler pulley 9. The idler restricting member 30 is rotatably supported by the actuating slider 32 via the support shaft 31. The idler restricting member 30 is movably disposed between the unrestricted position shown in FIG. 3 and the restricted position shown in FIG. The idler restricting member 30 is configured to displace the hook-type restricting arm portion 30a provided at the upper portion thereof to the side of the actuating portion 6b of the contact arm 6 by a compression spring 34 interposed between the actuating slider 32. (Figure 3 below is the counter-clockwise unrestricted position side) is energized.

The actuating slider 32 is slidably supported up and down with respect to the mechanism base portion 16. The actuating slider 32 is energized in a direction in which it is displaced upward by a compression spring 33 interposed between the mechanism base portion 16. At this action Below the block 32, a margin detecting member 35 is integrally provided. The remaining amount detecting member 35 extends downward and enters the detecting window 4d provided on the upper surface of the cassette 4. The remaining amount detecting member 35 constitutes a runaway mechanism K having a function of detecting whether or not the remaining amount of the punching members n to n in the cassette 4 reaches a certain number or less and prevents the free movement of the main body portion 2. Details of the runaway mechanism K are described later.

The sequence mechanism S includes a switch lever 5, a contact arm 6, and an idler restricting member 30. 3 to 5 show a case where the driving operation of the main body unit 2 is performed in a normal order in a state where the driving depth of the driving depth adjusting device 8 is adjusted to the maximum. 6 to 8 show a state in which the driving depth of the driving depth adjusting device 8 is adjusted to the minimum, and the driving operation of the main body unit 2 is performed in the same order. The former is different from the latter in the adjustment state of the depth of entry, and the same is that the driving operation is performed by operating in the normal order, so the two will be described together. In addition, both of the loading tools n to n having a number of roots exceeding the predetermined number are filled in the cassette 4, and the remaining amount is sufficient, and the anti-empty mechanism K to be described later is also in the same state.

3 and 6 show the initial state (non-operation state) of the driving tool 1. In this initial state, the front end portion 6a of the contact arm 6 protrudes from the front end of the front end portion 10. The protruding dimension is as described above, and is the same regardless of the adjustment state of the driving depth adjusting device 8.

Further, in the initial state, the idler restricting member 30 is in a state in which the restricting arm portion 30a is positioned at an unrestricted position above the actuating portion 6b of the contact arm 6 by the compression spring 34.

The idler restricting member 30 firstly faces the driving front end portion 10 toward the driving member W from the initial state of the unrestricted position, and causes the front end portion 6a of the contact arm 6 to abut against the driving member W. In the contact state, the driving tool 1 is pressed as shown in FIG. 4 and FIG. 7, and the driving depth is adjusted while the front end portion 6a of the contact arm 6 is relatively raised upward. The material abutting arm 8a of the device 8 abuts against the state of the driven material W. By the pressing operation, the front end of the front end portion 10 is brought into contact with the driving material W (FIG. 4), or the front end of the driving front end portion 10 is brought close to the driving material W ( FIG. 7), thereby implementing an opening operation in which the entirety of the contact arm 6 is relatively raised with respect to the driving front end portion 10 and the main body portion 2. This opening operation is carried out against the compression spring 17.

By the opening operation of the contact arm 6, the upper movable portion 6b is displaced upward. The amount of displacement (stroke amount) toward the upper side of the opening operation of the contact arm 6 differs depending on the adjustment state of the depth adjustment device 8, and the larger the penetration depth is, the larger the displacement amount is. The case is clearly shown in FIGS. 4 and 7 in that the relative positions of the actuating portion 6b with respect to the mechanism base portion 16 are different.

As shown in FIGS. 4 and 7, when the actuating portion 6b is displaced upward by the opening operation of the contact arm 6, the restricting arm portion 30a of the idler restricting member 30 is pushed upward, and thus the idle The wheel restricting member 30 rotates in the clockwise direction (restricted position side) in the drawing against the pressure spring 34. When the idler restricting member 30 is rotated in the idler restricting direction, as shown in the drawing, the tip end portion abuts against the idler restricting state of the rear surface (lower surface) on the rotational distal end side of the idler pulley 9. In the idler restricting state, the idler 9 is held in the effective position and the displacement toward the ineffective position side is restricted.

Further, in the cassette 4, the inserts n to n having a sufficient margin exceeding a certain number are left, so that the remaining amount detecting member 35 comes into contact with the upper portion of the push rod 4b and cannot enter the cassette 4 And the air defense mechanism K is in an unactuated state. Therefore, the actuating slider 32 or the idler restricting member 30 cannot be displaced downward, whereby the press-fitting reaction force of the valve stem 21 attached via the idle gear 9 is controlled by the idler restricting member 30 via the idler gear 9. As a result, the idle gear 9 is in a state of being held at the effective position and the displacement toward the ineffective position side is surely restricted.

As described above, in the state in which the idler restricting member 30 is in the idler restricting state at the restricted position and the anti-empty mechanism K is not actuated, if the operating switch lever 5 is pulled, the idler 9 held in the effective position is mainly The rotating base end side (the side of the support shaft 9a) is largely displaced upward, and the valve stem 21 is pressed against the shank 22 to be pressed into the upper open position, whereby the trigger valve 20 is opened. By the trigger valve 20 being opened, the driving operation is performed in the body portion 2 as described above.

In this way, since the remaining amount of the punching member n~n in the cassette 4 is sufficient, in the state in which the air-defense mechanism K is not actuated, the operating contact lever 6 can be opened first, and then the operating switch lever 5 can be pulled. The normal operation sequence performs the typing action.

On the contrary, in the erroneous operation sequence in which the switch lever 5 is first pulled, and then the contact arm 6 is pulled, the pull operation of the switch lever 5 itself becomes invalid, and the body portion is not implemented. 2 hits into the action. The operation of the sequence mechanism S in the case of operating in the wrong order is shown in Figs. 9 and 10. The initial state is the same as the state shown in Fig. 3 in which the penetration depth is adjusted to the maximum.

In the initial state shown in FIG. 3 and the driving tool 1 is not subjected to the pressing operation toward the driving material W, as shown in FIG. 9, even if the switching lever 5 is first pulled, the idler 9 is The rotation of the distal end side does not restrict the displacement of the idler pulley 30 toward the ineffective position side. Therefore, the idler pulley 9 is relatively pressed by the valve stem 21 and displaced to the ineffective position. Even if the switch lever 5 is pulled upward, the idler 9 is displaced to the inactive position, so that the valve stem 21 is not pressed into the upper open position, so the trigger valve 20 does not open.

As shown in FIG. 10, in a state where the switch lever 5 is pulled, even if the driving tool 1 is pressed downward, the contact arm 6 is opened, and the idler limit is pushed by the actuating portion 6b. The restricting arm portion 30a of the member 30 still causes the idler restricting member 30 to rotate against the compression spring 34 in the clockwise direction of the illustrated position, but in this stage, since the idler 9 is displaced to the inactive position, The restricting arm portion 30a of the idler restricting member 30 is wound only above the idler pulley 9 and is not engaged with the back side thereof, so that the idler pulley 9 remains in the state of being displaced to the ineffective position.

In this way, the remaining amount of the punching members n to n in the cassette 4 is relatively sufficient, so that even if the air defense striking mechanism K is not actuated, the switching lever 5 is first pulled, and then the contact arm 6 is performed. When the operation is started in the wrong order, the pulling operation of the switch lever 5 is also invalidated, and the trigger valve 20 is not opened, so the driving action is not performed.

Next, Fig. 11 to Fig. 13 show a state in which the driving operation is prohibited when the punching member n is not provided in the cassette 4. The driving depth adjustment device 8 is set to the maximum depth. The initial state shown in Fig. 11 is that the punching member n is exhausted except for the cassette 4. The aspect is the same as the initial state shown in FIG. From the initial state shown in Fig. 11, first, as shown in Fig. 12, if the contact arm 6 is opened by the pressing operation of the driving tool 1, the idler restricting member 30 is pushed by the operating portion 6b. The arm portion 30a is restrained, and the idler restricting member 30 is tilted in the clockwise direction as shown. As shown in the figure, since the normal operation sequence of the opening operation of the contact arm 6 is performed before the pulling operation of the switch lever 5, the restricting arm portion 30a of the idler restricting member 30 abuts against the front end side of the idler pulley 9, Thereby, the idler 9 is locked in its effective position.

When the contact lever 6 is opened in this manner, if the switch lever 5 is pulled, the idler 9 is locked in the effective position, and the rotation support side is largely displaced upward. As a result, A repulsive force (mainly the ability of the shank spring 22) for urging the valve shank 21 to the upper open position is added to the idler pulley 9. However, since the punching member n in the cassette 4 is zero (a certain number or less), the remaining amount detecting member 35 becomes a state in which the detecting window 4d can enter the inside (downward) of the cassette 4, and as a result, the idle The wheel restricting member 30 is in a state of being displaceable integrally with the actuating slider 32 at a third position downward.

Therefore, if the idler 9 is locked in the effective position by the idler restricting member 30, the repulsive force of the valve handle 21 is added to the idler 9 by the pulling operation of the switch lever 5, as shown in the figure. As shown in Fig. 13, the idler restricting member 30 is pressed against the front end portion of the idler pulley 9 by the repulsion force, and is displaced integrally with the actuating slider 32 against the compression spring 33 toward the third position below. In this manner, the idler restricting member 30 is displaced to the lower third position, and as a result, the idler 9 is largely rotated downward with respect to the switch lever 5 to be displaced to the inactive position, and therefore, the valve stem 21 is not squeezed. Press to the upper open position, so trigger Valve 20 is not opened.

Even if the contact arm 6 and the switch lever 5 are operated in the normal order, the air-defense mechanism K is actuated in a state where the remaining amount of the punch n~n in the cassette 4 reaches a fixed number or less. When the idle gear 9 is displaced to the ineffective position, the pulling operation of the switch lever 5 is invalidated, and therefore, the driving operation of the main body portion 2 is not performed.

If the pulling operation of the switch lever 5 is released from the state shown in Fig. 13, the squeezing force of the valve shank 21 is not attached to the idler restricting member 30 via the idler gear 9, so that the idler restricting member 30 is slidably operated. The block 32 is returned to the upper side integrally by the compression spring 33, and returns to the state shown in FIG.

As described above, the driving tool 1 according to the present embodiment includes not only the sequence mechanism S that performs the driving operation when the switch lever 5 and the contact arm 6 are operated in the normal order, but also the cassette mechanism 4. The air defense mechanism K that does not perform the driving operation in a state where the remaining amount of the punching member n reaches a certain number or less.

The illustrated air striking mechanism K is a configuration that does not prohibit (trigger lock) the pulling operation of the switch lever 5, and invalidates the pulling operation. Therefore, the pull operation force of the switch lever 5 is not normally increased, so that the support rigidity of the mechanism base portion 16 and the like which support the rigidity of the switch lever 5 is not required, thereby enabling the switch lever 5 and The thinner wall of the mechanism base portion 16 and the like are compacted, whereby the sequence mechanism S can be assembled not only compactly but also the air defense mechanism K can be assembled compactly.

Further, according to the exemplified driving tool 1, the configuration is as follows: regardless of the normal operation sequence of the sequence mechanism S or the erroneous operation sequence, if the driving member is in the cassette 4 When the remaining amount of n~n reaches a certain number or less, the switching lever 5 is pulled, and the idler restricting member 30 is retracted to the third position which is neither the restricted position nor the non-restricted position. The displacement of the idler gear 9 to the ineffective position is allowed, whereby the pulling operation of the switch lever 5 can be performed, but the pulling operation is invalidated by the air defense mechanism K, and the driving operation is not performed.

Therefore, the forcible operating force as previously configured to trigger the lock to prevent the kick is not attached to the switch lever 5, whereby the switch lever 5 can be realized and supported as compared with the prior art. The thinning of the mechanism base portion 16 or the like further achieves such compactness.

Further, the idler restricting member 30 is energized to the unrestricted position side by the compression spring 34 and the pulling operation of the switch lever 5 is ineffective (safe side), thereby reliably preventing accidental entry. action.

Further, according to the illustrated penetration depth adjusting device 8, it is possible to change the position of the material abutting arm 8a that is in contact with the driving material W with respect to the ejection opening 10a without changing the length of the contact arm 6 (interval of the driving direction) Thereby, the position of the ejection opening 10a when the main body unit 2 is pressed is changed, and the driving depth is adjusted. Therefore, by changing the depth of penetration, as a result, the stroke amount of the contact arm 6 (the amount of movement to the open position) is changed, but the stroke amount of the contact arm 6 is sufficient for the idler restricting member 30 to be in the restricted position and the unrestricted position. It suffices that the position is displaced between the positions. Therefore, the mechanism for changing the length can be omitted, whereby the configuration of the contact arm 6 can be simplified, and the peripheral structure can be made compact. Realize the integration of the air defense mechanism K.

Various changes can be made to the embodiments described above. For example, although exemplified Since the driving depth adjustment device 8 is exemplified, the front end portion 6a of the contact arm 6 is fixed from the initial state of the front end portion of the front end portion 10, and the depth is adjusted, and the stroke is changed. Alternatively, instead of the above-described penetration depth adjusting device 8, the depth of the driving member n may be adjusted by changing the length of the contact arm.

Further, the shape of the cassette 4 can be changed, and the plurality of the driving members can be temporarily joined in parallel by the wires, and loaded in a cylindrical state in a cylindrical shape.匣 box. In this case, the driving member feeding claw that moves the compressed air supplied to the main body unit 2 as a driving source and operates in conjunction with the main body unit 2 may be configured to be equivalent to a margin by using another setting. When the remaining amount of the punching member reaches a certain number or less, the engaging member of the remaining amount detecting member 35 is exemplified to restrict the action of the driving member feeding claw, and the air strike prevention is performed.

1‧‧‧Into tool

2‧‧‧ Body Department

3‧‧‧Hands

3a‧‧‧ plug connector

3b‧‧‧Accumulation room

3c‧‧‧Exhaust chamber

4‧‧‧匣 box

4a‧‧‧feed spring

4b‧‧‧Put

4c‧‧‧ Filling port

4d‧‧‧Detection window

5‧‧‧Switch lever

5a‧‧‧ spindle

6‧‧‧Contact arm

6a‧‧‧ front end

6b‧‧‧Operation Department

7‧‧‧ rod

8‧‧‧Into the depth adjustment device

8a‧‧‧Material arm

8b‧‧‧Adjustment turntable

8c‧‧‧Clamping recess

8d‧‧‧ engaging convex

8e‧‧‧ front end

9‧‧‧Idle wheel

9a‧‧‧ spindle

10‧‧‧Into the front end

10a‧‧‧shots

10b‧‧‧Into access

11‧‧‧cylinder

11a‧‧‧ stomata

11b‧‧‧return room

11c‧‧‧ stomata

12‧‧‧Piston

12a‧‧‧Piston upper room

12b‧‧‧Piston lower room

13‧‧‧Beat hammer

14‧‧‧Exhaust passage

15‧‧‧Locking

15a‧‧‧Operation recess

16‧‧‧Mechanism base

17‧‧‧Compressed spring

18‧‧‧Lock lever

20‧‧‧trigger valve

21‧‧‧ valve handle

22‧‧‧ handle spring

23‧‧‧ actuation valve

24‧‧‧ valve frame

25‧‧‧Main valve

25a‧‧‧ venting holes

26‧‧‧Valve spring

30‧‧‧Idle wheel limiting member

30a‧‧‧Restricted arm

31‧‧‧ Support shaft

32‧‧‧ actuation slider

33‧‧‧Compression spring

34‧‧‧Compression spring

35‧‧‧Residual detection component

K‧‧‧Air defense agency

n‧‧‧Into

S‧‧‧Sequence Agency

W‧‧‧

Fig. 1 is an overall front view of the driving tool of the embodiment.

Fig. 2 is an overall rear view of the driving tool of the embodiment.

Fig. 3 is a longitudinal sectional view showing the driving tool of the embodiment. This figure shows the initial state. This figure shows the state in which the penetration depth is set to the deepest.

Figure 4 is a longitudinal sectional view of the driving tool. This figure shows the state in which the contact arm is opened from the initial state shown in FIG.

Figure 5 is a longitudinal sectional view of the driving tool. This figure shows the state in which the driving operation is performed by pulling the operation of the switch lever after the contact arm is opened.

Figure 6 is a longitudinal sectional view of the driving tool. This figure shows the initial state. this The graph indicates that the penetration depth is set to the shallowest state.

Figure 7 is a longitudinal sectional view of the driving tool. This figure shows the state in which the contact arm is opened from the initial state shown in FIG.

Figure 8 is a longitudinal sectional view of the driving tool. This figure shows the state in which the driving operation is performed by pulling the operation of the switch lever after the contact arm is opened.

Figure 9 is a longitudinal sectional view of the driving tool. This figure is from the initial state shown in Fig. 3, and the state of the erroneous operation sequence of the operation switch lever is pulled first.

Figure 10 is a longitudinal sectional view of the driving tool. This figure shows the state in which the operating contact arm is opened after the erroneous operation sequence shown in FIG.

Figure 11 is a longitudinal sectional view of the driving tool. This figure shows the initial state. This figure shows the state of no punch in the cassette.

Figure 12 is a longitudinal sectional view of the driving tool. This figure shows the state in which the operating contact arm is opened in the state where there is no punching member in the cassette.

Figure 13 is a longitudinal sectional view of the driving tool. This figure is a state in which the normal operation sequence of the operation switch lever is pulled from the state shown in Fig. 12, and the air defense mechanism is actuated without performing the driving operation.

1‧‧‧Into tool

2‧‧‧ Body Department

3‧‧‧Hands

3b‧‧‧Accumulation room

3c‧‧‧Exhaust chamber

4‧‧‧匣 box

4a‧‧‧feed spring

4b‧‧‧Put

4d‧‧‧Detection window

5‧‧‧Switch lever

5a‧‧‧ spindle

6‧‧‧Contact arm

6a‧‧‧ front end

6b‧‧‧Operation Department

8‧‧‧Into the depth adjustment device

8a‧‧‧Material arm

8b‧‧‧Adjustment turntable

8c‧‧‧Clamping recess

8d‧‧‧ engaging convex

8e‧‧‧ front end

9‧‧‧Idle wheel

9a‧‧‧ spindle

10‧‧‧Into the front end

10a‧‧‧shots

10b‧‧‧Into access

11‧‧‧cylinder

11a‧‧‧ stomata

11b‧‧‧return room

11c‧‧‧ stomata

12‧‧‧Piston

12a‧‧‧Piston upper room

12b‧‧‧Piston lower room

13‧‧‧Beat hammer

14‧‧‧Exhaust passage

15‧‧‧Locking

15a‧‧‧Operation recess

16‧‧‧Mechanism base

17‧‧‧Compressed spring

20‧‧‧trigger valve

21‧‧‧ valve handle

22‧‧‧ handle spring

23‧‧‧ actuation valve

24‧‧‧ valve frame

25‧‧‧Main valve

25a‧‧‧ venting holes

26‧‧‧Valve spring

30‧‧‧Idle wheel limiting member

30a‧‧‧Restricted arm

31‧‧‧ Support shaft

32‧‧‧ actuation slider

33‧‧‧Compression spring

34‧‧‧Compression spring

35‧‧‧Residual detection component

K‧‧‧Air defense agency

S‧‧‧Sequence Agency

W‧‧‧

Claims (4)

A driving tool which is provided with an anti-aircrafting mechanism in addition to a sequence mechanism; the sequence mechanism is implemented when the contact arm is opened and the operation is performed only in a normal sequence in which the pulling operation of the switch lever is performed. Action; when the remaining amount of the punching member in the cassette reaches a certain number or less, the pulling operation of the switch lever is invalid; the driving tool has: an idler, which can be in an effective position Providing a relative displacement between the inactive position and the inactive position to switch the switching lever to be effective and ineffective; and between the idler and the contact arm, an idler limiting member is movable Provided between a restricted position at which the idler is fixed to the effective position and an unrestricted position in which the idler is allowed to be displaced toward the invalid position; the sequence mechanism is configured to use the normal operation sequence to make the idler The limiting member is displaced to the above-mentioned restricted position, and the pulling operation of the switching lever is performed by fixing the idler to the effective position On the other hand, in a state where the contact arm is in the closed position, the idler restricting member is positioned at an unrestricted position to allow the idler to be displaced toward the inactive position, thereby invalidating the pulling operation of the switch lever And the air defense detecting mechanism has a remaining amount detecting member, and moves to the remaining amount detecting position when the remaining amount of the driving member in the cassette reaches a certain number or less; and the air defense mechanism is configured to Volume detection component supports the above The idler restricting member is integrally moved to the remaining amount detecting position to retract the idler restricting member from between the idler and the contact arm, and by allowing the idler to face the invalid position The bit pulls the pull operation of the above-mentioned switch lever. The driving tool of claim 1, wherein the idler restricting member is rotatably supported by the remaining amount detecting member. The driving tool of claim 2, wherein the idler restricting member is energized toward the unrestricted position side. The driving tool according to any one of claims 1 to 3, wherein in the above-mentioned cassette, a driving depth adjusting device for adjusting a driving depth of the driving member for the driving material is provided, and the driving depth adjustment is performed. The device includes a material abutting arm that abuts against the driving material, and is configured to adjust the driving depth by changing the position of the material abutting arm with respect to the ejection opening.